package utils;
import Constant.Constant;

import Book.Book;
import com.bit.utils.FileUtils;

import java.time.LocalDate;

public class AnalyzingBook {
    public void storeObject(Book[] books, String filename) {
        int bookmath = 0;
        for(int i = 0; i < books.length; i++){

            if(books[i] != null){
                bookmath++;
            }
        }//判断有几本书
        StringBuilder jsonArray = new StringBuilder();
        for(int i = 0; i < bookmath; i++){
            jsonArray.append(books[i].toJSON());
            if(i != bookmath - 1){
                jsonArray.append("\n");
            }
        }
        FileUtils.writeFile(jsonArray.toString(),filename);

    }
    public Book[] loadObject(String filename) {
       String content = FileUtils.readFile("allbooks.txt");
        if (content == null || content.isEmpty()) {
            System.out.println("File is empty or does not exist: " + filename);
            return null;
        }
//2. 使⽤\n作为分隔符进⾏字符串分割
        String[] bookJsonStrings = content.split("\n");
        Book[] booklist =new Book[bookJsonStrings.length];
        for(int i = 0; i < bookJsonStrings.length; i++){
            booklist[i] = parseBookJson(bookJsonStrings[i]);
        }

        return booklist;
    }
    private Book parseBookJson(String json) {
        if(json.isEmpty()){
            return null;

        }
        String[] pairs = json.split(",");
        int bookId = Integer.parseInt(pairs[0]);
        String title = pairs[1];
        String author = pairs[2];
        String category = pairs[3];
        int publishYear = Integer.parseInt(pairs[4]);
        boolean isBorrowed = Boolean.parseBoolean(pairs[5]);
        int borrowCount = Integer.parseInt(pairs[6]);
        LocalDate shelfDate = LocalDate.parse(pairs[7]);
        if (title != null && author != null && category != null && shelfDate !=
                null) {
            Book book = new Book(title, author, category, publishYear, shelfDate);
            book.setBorrowed(isBorrowed);
            book.setBorrowCount(borrowCount);
            book.setBookId(bookId);
            return book;
        }
        return null;
    }

    public static void main(String[] args) {
        AnalyzingBook analyzingBook = new AnalyzingBook();
        Book[] ret = analyzingBook.loadObject(Constant.ALL_BOOK_FILE_NAME);
        for(int i = 0; i  < ret.length;i++){
            System.out.println(ret[i]);
        }

    }

    public static void main1(String[] args) {
        Book[] books = new Book[4];
        books[0] = new Book("java", "gaobo", "编程", 1994, LocalDate.of(2023, 9, 24));
        books[1] = new Book("mysql", "lisi", "编程", 1999, LocalDate.of(2024, 2, 10));
        books[2] = new Book("php", "gaobo", "编程", 2020, LocalDate.of(2023, 9, 23));
        books[3] = new Book("西游记", "吴承恩", "⼩说", 2024, LocalDate.of(2023, 9,23));
        AnalyzingBook analyzingBook = new AnalyzingBook();
        analyzingBook.storeObject(books,Constant.ALL_BOOK_FILE_NAME);
    }
}
